Support for plaster bases



A ril 24, 1928.

A. J. LUEDKE SUPPORT FOR PLASTER BASES Filed May '7, 1925 gasi 1 Zzzed/Ze Patented Apr. 24, 1928.

. UNITED, s'rA Es PATEN OFFICE.

aoeUsu: J. LUEDKnorMILwAoxEE, WISCONSINQASSIGNOR T MILWAUKEE CoR RUGATING COMPANY, or MILWAUKEE, WISCONSIN, A CORPORATION, or WIS,-

CONSIN.

SUPPORT FOR PLASTER ASE s- Application'filed May 7, 1925.- Serial No. 28,556.

This invention relates to improvements in concrete floors, and more particularly to means for sU1i porting and attaching the plaster base or lath for the ceiling of the 5 room below to the underside of the floor.

Reinforccdconcretc floors are now widely used, and many different types of formsi'or receiving and reinforcing the concrete have been used.- In setting up these forms, a te inporary wood frame work is first erected-and the plaster base or lath for the ceiling of the room belowlaid thereon. The form which may comprise the well known inverted domes or pans is then assembled upon the plaster base, the domes or pans being arrangedin parallel spaced relation and nailed lightly to the temporary wood frame work. After the concrete has been poured and sets the temporary wood frame work is removed,

the plaster base being held in place by the bonds formed by the concrete'which flows through the strands of the plaster basea slight amount and sets to clinch or lock the base in position. The domes or forms, of course, remain permanently in place. .In many cases, however, the forms or domes are removed and used over again forother floors, in which cases the plaster base for the ceiling below is not placed upon the'temafter the concrete hasset and the-frame work and forms removed, to various attachments such as nails or short lengths of wire partly embedded in the concrete, the ex posed ends of these nails and wires being inserted through and bent or twisted around the strands of the plaster base to hold the same securely in position against the concrete joists. These various attaehments'used 4O heretofore, however, frequently rust through and break off, andare inconvenient to handle and are set up with some diflicultv- One of the objects of thepresent inven- Itiou, therefore, is to provide improved means r adapted to be embedded in the'concrete'of a floor and toprovide adequate support for attaching the plaster base of a ceiling to the underside of the floor after the concrete has beenpoured into and sets in the form.

Another object is to provide improved means adapted to be anchored in the underside of a concrete floor, said means being rovided with transverse anchoring members the purpose of illustration only.

porary wood frame work but is attached,v

' Substantially the ends of which are adaptedto been'iloedded in theconcrcte ofthe floor and in a'dditi'on tosupport reinforcing bars if desired,

while the intermediate portions of said mem-' bers serve for the attachment and support of a plaster base for the ceiling belowL -Another object is to provide improved means of the character described for-sup- 7 porting the plaster base for a ceiling, said means being durable, easily'handled and manufactured at a comparatively low cost.

Other objects'and advantageswill hereinafter appear. a

In the drawings supports made in accordance with the present invention. are shown associated with a floor "of aparticulartype Well known to those skilled in the are, but it is to be understood that the device may be used in connection with ffioors of otherztypes and thatthe invention has been shown ass0- ciated with the particular floor shown for In the drawings: 7 a i Figure 1 is 'a i-plan View, partly broken away, of a formlfor a concrete floor, show-- ing the improved'supports placed in position; I 1 w Fig- 2 is section on line 21-2 of Fig-1,

Fig.3 is a fragmentary perspective view. partlybroken'away; Fig. 4 isan enlarged section on line 4-4: of-Fig[1.; I

Fig. 5 is avie-wsimilar to Fig. t, showing I.- amodlfied form; and; I I

Fig.6 is a fragmentaryperspective Vie The. forms for receivingzthe concrete mav COITIPI'ISB' dOIDGS or pans 1 arranged in parallelspaced relation, the edges ofthe domes being bent outwardly .Ito form supporting flanges 2. The domes are shown supported by;,the usualtemporary wood frame Work comprising thecolumns 3 I and cross, membersA. I f

Vr'shape or trough-shape members 5 having thelower edges thereof bent outwardly to form flanges 6, are arrangedbetween domes 1, as shown. Pins or nails 7 pass through and beyond the sides'" of members 5 and are arranged at intervals along the latter, the ends of the pins being embedded in the concrete when poured, thus servingto securely anchor memberso in positi u. It desired the ends of p ns 7 may also be used. to support bars 8 for reinforcing the joists 9 or lower ends of the concrete girders formed intermediate forms 1, as shown.

After the concrete has been poured and has set in the form, the temporary wood frame work and the forms or domes 1 are removed and a suitable plaster base 10 is applied to the underside of the floor. ires 7 may be looped around the exposed portions of pins 7 between the sides of members 5, the ends of the wires extending through the plaster base and being twisted together, as shown in Fig. 4, whereby the latter is secured to the underside of the floor. I

As shown in Fig. 5, a ceiling comprising a frame work of channels 11 and lath 12 secured thereto by any suitable means such as wires 18, may be suspended from pins 7 by hangers or rods 14 after the temporary wood frame work and the forms or domes 1 have been removed.

From the foregoingit will be seen that members 5 and pins 7 associated therewith are firmly anchored in the concrete and provide supports for attaching the plaster base for the ceiling to the underside of the floor after the concrete has been poured and has set and the temporary wood frame work and the forms or domes 1 removed, the members also providing supports for the reinforcing bars for the concrete, if desired.

Various changes in the size, shape and arrangement of the parts may be made without departing from the spirit of the invention or the scope of the claims.

The invention claimed is:

1. In combination with a concrete floor a plurality of elongated trough-shaped members embedded in the under-side of the floor with their lower edges substantially flush therewith, said members being arranged in parallel spaced relation with respect to each other, a plurality of'horizontally disposed pins arranged at spaced intervals along each trough-shaped member and extending through the latter and beyond the sides of the same with their respective ends embedded in the concrete and serving to anchor said trough-shaped members in position, the portions of the pins projecting beyond the trough-shaped members belng adapted to support reinforcing rods embedded in the concrete and located in spaced relation to the trough-shaped members, a plaster base below the floor and means supported bythe portions of the pins located within the trough shaped members for supporting the plaster base.

2. In combination with a concretefioor a plurality of elongated trough-shaped members embedded in the under-side of the floor with their lower edges substantially flush therewith, said members being arranged in parallel spaced relation with respect to each other, a plurality of horizontally disposed pins arranged at spaced intervals along each trough-shaped member and extending through the latter and beyond the sides of the same with their respective ends embedded in the concrete and serving to an.- chor said trouglrshaped members in position, a plaster base below the floor and means supported by the portions of the pins located within the trough.shaped members for supporting the plasterpbase.

A concrete floor construction comprising a plurality of elongatedinverted troughshaped members embedded in the under-side of the floor, the interiors of the troughshaped members opening to below thefloor,

a plurality of pins extending transverselythrough each trough-shaped member and located at spaced points thereon, the pins extending through the trough-shaped members and beyond the sides of the same and having their end portions embedded in the concrete and means carried by the portions of the pins located within the trough-shaped members and adapted to supporta plaster base, or the like.

4. A concrete floor construction comprising a plurality of elongated inverted troughshaped members embedded in the underside of the floor, the interiors of the troughshaped members opening to below the floor, a plurality of pins extending transversely through each trough-shaped member and located at spaced point-s thereon, the'pins extending through the trough-shaped members and beyond the sides of the same and having theirend portions embedded in the concrete, the portions of the pins projecting beyond the trough-shaped members being shaped and adapted to support rein forcing rods embedded in theconcrete and located in spaced relation to the troughshaped members, and means carried by the anensr J- eanna 

